Ede, A. N., and A. A. Adegbite. “Effects of Nigerian Limestone and Superplasticizer on the Hardened Properties of Self Compacting Concrete”. Journal of Chemical, Mechanical and Engineering Practices (JCMEP), vol. 3, no. 3, Dec. 2013, pp. 17-24, http://icidr.org.ng/index.php/Jcmep/article/view/1099.